<!DOCTYPE html>
<title>Double Pendulum</title>
<meta charset="utf-8"/>
<style>
html, body {
    background: black;
    width:  100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
}
        canvas {
            background-color: black;
        }
</style>
<canvas id="c2d"></canvas>
<canvas id="c3d"></canvas>
<script src="pendulum.js"></script>
